Finding the Fourth Proportional to 1,916.28, 2,870.10 and 1,048.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,916.28 : 2,870.10 = 1,048.50 : x
2. Step 2: Convert to fraction form
   1,916.28/2,870.10 = 1,048.50/x
3. Step 3: Cross multiply
   1,916.28x = 2,870.10 × 1,048.50
4. Step 4: Simplify right side
   1,916.28x = 3,009,299.85
5. Step 5: Solve for x
   x = 3,009,299.85/1,916.28
6. Step 6: Final answer
   x = 1,570.39